Digest for sci.electronics.repair@googlegroups.com - 13 updates in 2 topics

tabbypurr@gmail.com: Jan 14 01:27AM -0800

On Saturday, 13 January 2018 20:33:13 UTC, BurfordTJustice wrote:
> The real question who in the hell fucking cares??
 
I didn't, until I found the brake pads fitted by a quick nationwide chain a year earlier were totally disintegrating.
 
Funny thing is you can get the same brake pads at a scrapyard for a fraction the price, but no-one wants to.
 
 
NT
tabbypurr@gmail.com: Jan 14 01:30AM -0800

On Thursday, 11 January 2018 23:59:39 UTC, Mad Roger wrote:
> stopping distance.
> <https://www.justnet.org/pdf/EvaluationBrakePads2000.pdf>
 
> I'm not sure how to extrapolate that information to stopping distances.
 
I would have thought that as long as the driver & brake servo can apply enough force it would make no difference at all to stopping distances.
 
 
NT
Mad Roger <rogermadd@yahoo.com>: Jan 14 04:37PM

On Sun, 14 Jan 2018 01:30:23 -0800 (PST),
 
> I would have thought that as long as the driver & brake servo can
> apply enough force it would make no difference at all to stopping
> distances.
 
Thanks for that observation as I'm trying to derive as much real-world
benefit from the police cruiser report as is possible given Clare's astute
observations about EE and FF pads faring differently, but not because of
their coefficient of friction.
 
There were 3 police tests over the decade, where only the penultimate test
aimed for uniform pedal pressure.
1. https://www.justnet.org/pdf/BRAKEPAD.PDF
2. https://www.justnet.org/pdf/EvaluationBrakePads2000.pdf
3. https://www.justnet.org/pdf/Copy-of-9-22-10-Edited-Brake-Pad-Report-Draft.pdf
 
 
The middle test is the one that aimed for a given pedal pressure:
a. 45-to-15mph at 10ft/s/s (approximately ~10 foot pounds +- a few)
b. 70-to-30mph at 22ft/s/s (approximately ~20 foot pounds +- a few)
c. 90-to-0mph at 22ft/s/s (approximately ~30 foot pounds +- a few)
 
Fundamentally, they said pedal pressure is, effectively, what a human does
all day every day - hence pedal pressure is, arguably, more important in a
well-used "cruising" vehicle that doesn't do panic stops consistently.
 
A targeted deceleration rate where pedal force is proportional to pad temp.
 
The other two studies were different.
1. Mostly stopping distance
2. Mostly pedal pressure
3. Mostly driver perception
 
In the end, the DOT edge code (AMECA edge code) is only slightly useful to
a consumer, I think. I wish it were more useful, but I've gleaned out of it
what I can, and that's the best any of us can hope to do.
 
I was hoping to get more insight from the scientific and mechanical folks
here.
oldschool@tubes.com: Jan 14 03:00AM -0600

On Sat, 13 Jan 2018 15:38:35 -0800 (PST), dansabrservices@yahoo.com
wrote:
 
>and can be installed easily by anyone with soldering skills. The switches
>themselves are not "cleanable" typically. In most cases the small metal
>diaphragm gets fatigued and won't work properly. These switches
 
I always regret throwing stuff away. I have tossed several mice over the
years that probably still had usable switches. From what you said, the
price seems right, but only if it's free shipping. Much of the time
shipping a $1 item can cost as much as $10, or maybe even more. But I
will hang on to this mouse for now till I find a switch to use.
Soldering it is no problem.
Fox's Mercantile <jdangus@att.net>: Jan 14 03:09AM -0600

On 1/13/18 9:09 PM, Rheilly Phoull wrote:
>>> these are more "Designed by idiots" products.
 
>> You do know they make USB hubs right?
 
> Cue to question from yesteryear "What's hub and will it work on my win98?"
 
Well yeah.
 
Notwithstanding, here's the USB to PS/2 adapter you need.
<https://www.ebay.com/itm/252486083292>
 
And for your 2-USB Port box, you can buy one of these:
<https://www.ebay.com/itm/112496332260>
That will free up the 2nd USB port for you flash drives.
 
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
Fox's Mercantile <jdangus@att.net>: Jan 14 03:12AM -0600

> Much of the time
> shipping a $1 item can cost as much as $10, or maybe even more.
 
A myth for the most part, but shipping is not free.
When some says "Free shipping" the shipping cost is added to the part.
 
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
tabbypurr@gmail.com: Jan 14 01:34AM -0800


> I did just find they make adaptors, to convert a USB mouse to PS/2. I
> ordered one on ebay for about $3.
 
Sometimes those work, sometimes not. It depends on what the mouse & PC are capable of.
 
 
> and keyboard, and only had 2 USB ports. In order to use a flash drive I
> had to keep unplugging either the mouse or keyboard.... Apparently these
> are more "Designed by idiots" products.
 
It's a bit cheaper to lose the ps/2 ports, and end users assume USB mice are somehow better, although they're really worse.
And fwiw you can plug the mouse & keyboard into any usb port.
 
 
NT
whit3rd <whit3rd@gmail.com>: Jan 14 03:22AM -0800

> wrote:
 
> >The switch inside is called a tact-switch and these are readily available
> >and can be installed easily by anyone with soldering skills. The switches
 
I always regret throwing stuff away. I have tossed several mice over the
> years that probably still had usable switches.
 
Yeah, but... there's flat buttons and raised ones, 5mm square and 8mm square,
surface mount and through-hole, and probably a dozen other variants.
 
Sometimes the switch is just like one in my (sizeable) junque collection, sometimes not.
Every old dead VCR has a dozen, but that's not a dozen different types, just a dozen
examples.
 
Sometimes, too, it's a plastics-getting-sticky problem, and the switch is fine if
you just smear a tiny bit of silicone grease where the friction is.
"~misfit~" <shaun.at.pukekohe@gmail.com>: Jan 15 12:37AM +1300

> USB and infared these days.
 
> So, until I can get one from ebay, is there any temporary fix? (The
> other mouse functions work fine).
 
I just got a packet of 10 mouse switches from Aliexpress for $3.
--
Shaun.
 
"Humans will have advanced a long, long way when religious belief has a cozy
little classification in the DSM*."
David Melville (in r.a.s.f1)
(*Diagnostic and Statistical Manual of Mental Disorders)
Tim Schwartz <tim@bristolnj.com>: Jan 14 08:03AM -0500

> USB and infared these days.
 
> So, until I can get one from ebay, is there any temporary fix? (The
> other mouse functions work fine).
 
Don't forget the the cable could be going bad after a few 100,000 flexes.
 
--Tim
Tom Biasi <tombiasi@optonline.net>: Jan 13 04:53PM -0500

> USB and infared these days.
 
> So, until I can get one from ebay, is there any temporary fix? (The
> other mouse functions work fine).
 
Walmart has a USB mouse for $4.79 USD
ABLE1 <someone@nowhere.net>: Jan 14 08:34AM -0500

> USB and infared these days.
 
> So, until I can get one from ebay, is there any temporary fix? (The
> other mouse functions work fine).
 
Hi Oldschool, I have been reading this thread with a smile.
 
I also have a Win98se machine that I desperately need to do what I do.
 
When I was really concerned it was was going to die and leave me with
nothing but tears and frustration beyond human limits, I searched
eBay and found a guy that was building Pentium 4 systems running
Win98se. Long story short I bought two(2) for $125 each.
 
Now I have a set of twin Win98se machines, Unit (A) and Unit (B).
Both with USB mouse and keyboard. Presently only using Unit (A) and by
my theory of universal backup planning as long as I have Unit (B) then
Unit (A) will never die. Best $125 ever spent.
Well actually $250 but who's counting.
 
My original Win98se still runs to this day and only use it when I need a
file that was not important at the time, 5 years ago, to move over.
 
Good luck with your PS/2 to USB adapter thingie. That may be a short
term fix as everything eventually breaks, one way or another.
 
Les
Allodoxaphobia <knock_yourself_out@example.net>: Jan 14 04:35PM


> Yea, I know computer mice are cheap, but I need a PS/2 connector and
> want a ball mouse. I dont like the infared mice, and can not use a USB
> mouse on my Windows 98 computer.
 
Visit your local 2nd-hands shops: GoodWill, ARC, Salvation Army, etc.
Lots of widows donate the geezer's old computer stuff and there are
often many old mice handing from peg boards in those stores.
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